JPS634372Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a strain relief retention mechanism for insulation displacement connectors, particularly male connectors.

2. Description of the Related Art As a male connector of a normal press-contact connector, for example, the one shown in the perspective view of FIG. 1 or 2 is known. That is, the one in Fig. 1 consists of a combination of a male housing A, a pressing tool B, and a strain relief C. After a flat cable (not shown) is pressed into contact with the M-type terminal m of the male housing A by the pressing tool B, the metal fitting a is attached. The press tool B and the male housing are engaged and fixed using the strain relief tool C.
is fixed by engaging the lower protrusion c of the support piece b with the side end step d of the male housing A. The one in Figure 2 consists of a combination of a male housing A', a pressing tool B', and a strain relief C'. Pressing tool as well as pressure contact
Insert metal fittings a' protruding from both ends of B' into sockets b' at both ends of male housing A' to engage and fix press tool B' to male housing A', then support strain relief C'. It is fixed by engaging the hole d' of the piece c' with the socket b'. In addition, M type terminal m,
Opposed portions of m' have female terminals (not shown) connected to male terminals (not shown) of the female housing.

However, the retention mechanism of the strain relief on the male housing of such conventional insulation displacement connectors is simply a mechanism for engaging the protrusion or hole of the support piece of the strain relief with the step or convex portion on the side end of the male housing, respectively, so that the retention of the strain relief on the male housing is extremely uncertain and prone to coming loose.

On the other hand, a connector as shown in FIG. 3 is known as a press-contact connector. This pressure contact connector is engaged with a male connector D (strain relief and pressing tool not shown) having lock arms e protruding from both ends as shown in the front view of FIG. 3a, and the lock arms e. A female connector E as shown in the partially cutaway front view of FIG. 3b is provided with a rotary lever h having a hole f and a protrusion g for removing the lock arm facing the hole f, provided on the outside of the wall surface i at both ends. FIG. 4 shows the state in which both connectors D and E are engaged. Note that j is a male terminal.

As a mechanism for separating the male connector D from the female connector E, when the lever h is rotated in the direction of the arrow, the protrusion g of the lever h can be seen from the enlarged view of the engaging portion of the lock arm e shown in FIG. presses the engagement protrusion k of the lock arm e, and by continuing to press it along the tapered portion l below it, simultaneously bends the lock arm e and lifts it upward to separate the male connector D from the female connector E. That is what it is.

When applying this mechanism for engaging and disengaging male and female connectors using the lock arm to the male connector of the above-mentioned pressure welding connector, the lock arm is attached to the male housing,
It is conceivable that it may be provided on either the pressing tool or the strain relief, but when it is provided on the male housing, the female terminal with the M-type pressure contact terminal may be installed in advance in the male housing, or the male housing with the above-mentioned terminal assembled. It gets in the way when pressing the flat cable with the pressing tool and causes trouble in the assembly work. or,
Similarly, when a lock arm is provided on the pressing tool, the assembly work is also hindered. Therefore, it is most desirable to install the lock arm on the strain relief, but if it is attached to the strain relief of the type shown in FIG.
The state shown in the figure will be reached. That is, FIG. 6a shows a case where a lock arm e is provided at the lower end of the support piece b of the strain relief C shown in FIG.
Flat cable H with pressing tool F as shown in figure b.
When engaged with the conventional male housing A shown in FIG. 1, which is pressed into contact with the housing A, the state shown in FIG. 7 is obtained.
That is, male housing A with strain relief C
The strain relief is engaged by the protrusions c at the ends of the support piece b of the strain relief engaging with the stepped portions d at both ends of the male housing A. When A is fitted into the female connector E as shown in Figs. 3 and 4 and removed using the lock arm e, the fifth
As shown in the figure, when the engagement protrusion k of the lock arm e receives an external force _F1 in the direction of the arrow by the protrusion g of the lever h, the protrusion c deforms in the direction of the arrow opposite to the external force _F1 , causing the strain relief C to move away from the male housing A. Otherwise, the male connector may become detached from the female connector E due to the frictional pressure between the protrusion c and the inner wall of the female connector E.

Therefore, the present invention does not have such drawbacks, and the strain relief provided with a lock arm is securely held in the male housing of the insulation displacement connector, and the strain relief that allows the male connector of the insulation displacement connector engaged with the female connector to be easily detached by the lock arm. This was done for the purpose of providing a relief holding mechanism.

The present invention will be explained below based on FIGS. 8 to 10. FIG. 8 shows a perspective view of the male housing and pressing tool of the pressure welding connector according to the present invention,
The main body 1 of the male housing has a structure similar to that of a conventional male housing in which an M-type terminal 2 is protruded from the top surface, but a vertical recess 3 is formed at the side end in the longitudinal direction. A dovetail groove 4 is provided on the opposing inner wall surfaces of the recess, and two protrusions 5 and 6 are provided on the upper and lower walls of the recess.

Further, the pressing tool has U-shaped support pieces 7 hanging down from both ends in the longitudinal direction, and a groove 8 is formed in the front end recess to align with the dovetail groove 4 formed on the inner wall surface of the recess of the male housing. be done. Note that 9 is a flat cable that is pressed into contact with the M-type terminal 2 of the male housing.

FIG. 9(b) shows the state in which the flat cable 9 is pressed against the male housing using a pressing tool, and the lower end recess 7' of the supporting piece 7 of the pressing tool is locked with the protrusion 6 below the side end of the male housing. The pressing tool is fixed to the male housing. Further, FIG. 9A shows a perspective view of the strain relief according to the present invention for fixing the flat cable 9 pressed against the pressure-welding male housing with a pressing tool. That is, the strain relief according to the present invention consists of a rectangular plate-like member 1
Support pieces 11 are vertically provided on both ends of the longitudinal direction of 0,
A flexible lock arm 12 having an engaging protrusion 13 at its tip protrudes from the lower end of the support piece 11 toward the outside and upward of the support piece. Also, support piece 1
A claw 14 is provided on both sides of the lower end of the male housing to engage with a dovetail groove 4 formed in the recess 3 of the male housing. The pawl 14 is preferably a triangular prism-shaped projection with a taper 14' corresponding to the acute-angled groove surface of the dovetail groove 4. Also, support piece 1
A strain relief fixing protrusion 15 is provided on the inner side of the housing 1, that is, on the opposite side from the lock arm 12, at a position where it engages with an upper protrusion 5 formed on the wall surface of the recess of the male housing.

Next, the operation of the strain relief holding mechanism of the pressure welding connector of the present invention will be explained. That is, as described above, first, the flat cable 9 is pressed into contact with the M-type terminal on the male housing using a pressing tool, and then the supporting piece 7 of the pressing tool is engaged with the lower protrusion 6 on the wall of the recess of the male housing. A male housing with a pressing tool as shown in FIG. 9B is formed.
The flat cable 9 is then folded back over the top of the pusher and the strain relief is engaged with the pusher male housing. For this engagement, by inserting the claw 14 at the tip of the support piece of the strain relief from above into the groove 8 of the pressing tool and the dovetail groove 4 of the male housing, the male connector shown in the perspective view in FIG. Can be assembled.

In this case, the protrusion 15 provided on the inside of the support piece 11 rides over the protrusion 5 of the male housing by elastically bending the center part of the support piece 11 outward, and is inertia-locked to the lower part of the protrusion 15. Full engagement does not occur. Therefore, the strain relief is held in the vertical direction with respect to the male housing by the protrusion 15 of the support piece and the protrusion 5 of the male housing, and the support piece 11 of the strain relief itself and the support piece are held in the front-rear direction or the left-right direction. This is reliably achieved by the engagement of the claw 14 at the tip with the recess 3 and dovetail groove 4 of the male housing. In addition, even if an external force is applied to the lock arm of the strain relief, only the strain relief will not come off.
The male connector can be reliably separated from the female connector.

As explained in detail above, according to the strain relief holding mechanism of the pressure welding connector of the present invention, the lock arm is provided on the support piece of the strain relief, a claw is provided on the lower end of the support piece, and a claw is provided on the inside of the support piece. The strain relief having the protrusions formed thereon has a recess formed at its side end, and is configured to be engaged with the male housing in which the recess is formed with engagement grooves and protrusions for the claws and protrusions of the support piece, respectively. The strain relief, pressing tool, and male housing of the insulation displacement connector are reliably assembled and engaged, and the insertion and disengagement of the insulation displacement connector with respect to the female connector is also reliably achieved. This has the effect of greatly improving workability.

[Brief explanation of the drawing]

1 and 2 are perspective views of a male connector of a conventional pressure welding connector, FIG. 3 a is a front view of a conventional male connector, FIG. 3 b is a partially cutaway front view of a conventional female connector, and FIG. The figure is a partially cutaway front view showing the male and female connectors in figure 3 in an engaged state, and figure 5 is a partially cutaway front view of the male and female connectors in figure 4.
An enlarged cross-sectional view of the lock arm engaging portion shown in Fig. 6a.
is a perspective view of a strain relief of the type shown in Figure 1 with a locking arm;
FIG. 6b is a perspective view showing a state in which a flat cable is pressed into contact with a conventional male housing using a pressing tool;
FIG. 7 is a perspective view showing a state in which the strain relief shown in FIG. 6a is engaged with the male housing shown in FIG. Fig. 9A is a perspective view of the strain relief according to the present invention, Fig. 9B is a perspective view showing a state in which a flat cable is press-connected to the male housing according to the present invention, and Fig. 10 is a pressure-connecting connector according to the present invention. 1 shows a perspective view of a male connector of FIG. ...Male housing, ...Press tool, ...Strain relief, ...Male connector, 1...
Male housing body, 2... M-type terminal, 3... Recess, 4... Dovetail groove, 5, 6... Protrusion, 7... Support piece, 9... Flat cable, 11... Support piece,
12...Lock arm, 13...Protrusion, 14...
Claw, 15...protrusion.

Claims (1)

[Scope of utility model registration request] A lock arm 12 is provided to protrude outward and upward from the lower end of a support piece 11 that is vertically provided at both ends of the strain relief of the pressure welding connector, and claws 14 are provided on both sides of the lower end of the support piece 11.
and further a protrusion 15 on the inside of the support piece 11.
A strain relief of a pressure welding connector is characterized in that the strain relief formed by forming a strain relief is engaged with a male housing having a recess 3 formed at both ends thereof and a dovetail groove 4 and projections 5 and 6 provided in the recess 3. Relief retention mechanism.